Black photosensitive resin composition and light-blocking layer using the same

Abstract

The present invention provides a novel black photosensitive resin composition, which includes: a polysiloxane, a black pigment, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator and a solvent. Accordingly, the black photosensitive resin composition of the present invention can meet the requirements for optical density and resistance under high temperature and is advantageous to the application in a touch panel. In addition, the present invention further provides a light-blocking layer that is manufactured from the black photosensitive resin composition.

What is claimed is: 
     
       1. A black photosensitive resin composition, which includes:
 (A) 0.5-5.0 wt % of a polysiloxane; 
 (B) 20-70 wt % of a black pigment; 
 (C) 1.0-30 wt % of an alkali-soluble resin; 
 (D) 0.5-10 wt % of a photopolymerizable compound; 
 (E) 0.5-5.0 wt % of a photopolymerization initiator; and 
 (F) a solvent as the remainder; 
 wherein the polysiloxane is a copolymer having a siloxane backbone, and the copolymer having a siloxane backbone includes the following formula (I) unit and formula (II) unit: 
 
       
         
           
           
               
               
           
         
         wherein R 1 , R 2  and R 3  are each independently H or C 1-6  alkyl group; s is an integer of 0 to 5; and r is an integer of 1 to 6. 
       
     
     
       2. The black photosensitive resin composition of  claim 1 , wherein the copolymer having a siloxane backbone further includes at least of following formula (III) unit and formula (IV) unit: 
       
         
           
           
               
               
           
         
         wherein R 4 , R 5  and R 6  are each independently H or C 1-6  alkyl group; and x and y are each independently an integer of 0 to 5. 
       
     
     
       3. The black photosensitive resin composition of  claim 2 , wherein the copolymer having a siloxane backbone further includes a formula (V) unit: 
       
         
           
           
               
               
           
         
         wherein R 7  and R 8  are each independently H or C1-6 alkyl group; t is an integer of 0 to 5; m and n are each independently an integer of 1 to 3; and m+n is 3. 
       
     
     
       4. The black photosensitive resin composition of  claim 1 , wherein the copolymer having a siloxane backbone has a weight average molecular weight of 500 to 3,000. 
     
     
       5. The black photosensitive resin composition of  claim 1 , wherein the photopolymerizable compound includes an ethylenically unsaturated group. 
     
     
       6. The black photosensitive resin composition of  claim 1 , wherein the alkali-soluble resin is an alkali-soluble acrylic resin. 
     
     
       7. The black photosensitive resin composition  claim 1 , wherein the black pigment is using carbon black. 
     
     
       8. The black photosensitive resin composition of  claim 1 , wherein the black photosensitive resin composition is used to form a light-blocking layer in a touch panel. 
     
     
       9. A light-blocking layer, which is formed by the black photosensitive resin composition of  claim 1 .